(A classic wonderful document that even us Atari ST users used to consult when developing apps!)
See page 216 (240 in the PDF), "Controls Not Supported by the Macintosh Toolbox".
"Little Arrows
The control that is two arrows pointing in opposite directions is commonly
called little arrows. It is used to increase or decrease values in a series.
Figure 7-16 shows one example of the little arrows control.'
So two small vertically stacked arrows as you'll see in their screenshot.
And you're right, those arrows to the left of the article title should be for expand/contract. (See 7-18, page 242 "Outline triangle control" in the same PDF)
Comments
Ok you just made me go dig into the classic official Macintosh Human Interfaces Guidelines: http://interface.free.fr/Archives/Apple_HIGuidelines.pdf
(A classic wonderful document that even us Atari ST users used to consult when developing apps!)
See page 216 (240 in the PDF), "Controls Not Supported by the Macintosh Toolbox".
"Little Arrows The control that is two arrows pointing in opposite directions is commonly called little arrows. It is used to increase or decrease values in a series. Figure 7-16 shows one example of the little arrows control.'
So two small vertically stacked arrows as you'll see in their screenshot.
And you're right, those arrows to the left of the article title should be for expand/contract. (See 7-18, page 242 "Outline triangle control" in the same PDF)